Interestingly enough, if you throw it hard and release it cleanly, the dart with the tiny fins flies just fine.
This should indicate a fair chance of success in making fin-stabilized VLD high BC bullets for use in cylinder bore .410 shotguns like the Saiga .410 I'm working with (see below and the related page under the innovation and invention tab). The darts shown here are NOT the type of raw materials to make firearms projectiles out of, however. That is going to take some careful planning, purchasing and creative handloading. I actually found it difficult to type the words "creative handloading" here, despite the fact that I've done a fair amount of it. The truth is that handloading is deadly serious business that can go wrong in many, many ways.
Better yet -- this is a rare bit of KIR research that can be verified with a few hand tools, some cheap darts and a trip to your local pub. You don't even need to own a gun to do this one.